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PCA9541APW/01 Datasheet(PDF) 45 Page - NXP Semiconductors |
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PCA9541APW/01 Datasheet(HTML) 45 Page - NXP Semiconductors |
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45 / 45 page ![]() NXP Semiconductors PCA9541A 2-to-1 I2C-bus master selector with interrupt logic and reset © NXP Semiconductors N.V. 2014. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 24 April 2014 Document identifier: PCA9541A Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. 22. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features and benefits . . . . . . . . . . . . . . . . . . . . 2 3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 Ordering information . . . . . . . . . . . . . . . . . . . . . 3 4.1 Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 3 5 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6 Pinning information . . . . . . . . . . . . . . . . . . . . . . 5 6.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 6 7 Functional description . . . . . . . . . . . . . . . . . . . 6 7.1 Device address . . . . . . . . . . . . . . . . . . . . . . . . . 6 7.2 Command Code . . . . . . . . . . . . . . . . . . . . . . . . 7 7.3 Interrupt Enable and Control registers description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 7.3.1 Register 0: Interrupt Enable (IE) register (B1:B0 = 00b) . . . . . . . . . . . . . . . . . . . . . . . . . 10 7.3.2 Register 1: Control Register (B1:B0 = 01b) . . 11 7.4 Interrupt Status registers. . . . . . . . . . . . . . . . . 15 7.4.1 Bus control lost interrupt . . . . . . . . . . . . . . . . . 15 7.4.2 Recovery/initialization interrupt. . . . . . . . . . . . 15 7.4.3 Downstream interrupt . . . . . . . . . . . . . . . . . . . 16 7.4.4 Functional test interrupt . . . . . . . . . . . . . . . . . 16 7.4.5 Register 2: Interrupt Status Register (B1:B0 = 10b) . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.5 Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 17 7.6 External reset . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.7 Voltage translation . . . . . . . . . . . . . . . . . . . . . 18 8 Characteristics of the I2C-bus . . . . . . . . . . . . 19 8.1 Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 8.2 START and STOP conditions . . . . . . . . . . . . . 19 8.3 System configuration . . . . . . . . . . . . . . . . . . . 20 8.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 20 8.5 Bus transactions . . . . . . . . . . . . . . . . . . . . . . . 21 9 Application design-in information . . . . . . . . . 24 9.1 Specific applications . . . . . . . . . . . . . . . . . . . . 24 9.2 High reliability systems . . . . . . . . . . . . . . . . . . 25 9.3 Masters with shared resources. . . . . . . . . . . . 26 9.4 Gatekeeper multiplexer . . . . . . . . . . . . . . . . . 26 9.5 Bus initialization/recovery to initialize slaves without hardware reset . . . . . . . . . . . . . . . . . . 27 10 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 28 11 Thermal characteristics . . . . . . . . . . . . . . . . . 28 12 Static characteristics . . . . . . . . . . . . . . . . . . . . 28 13 Dynamic characteristics . . . . . . . . . . . . . . . . . 30 14 Test information . . . . . . . . . . . . . . . . . . . . . . . . 32 15 Package outline. . . . . . . . . . . . . . . . . . . . . . . . 33 16 Soldering of SMD packages . . . . . . . . . . . . . . 36 16.1 Introduction to soldering. . . . . . . . . . . . . . . . . 36 16.2 Wave and reflow soldering. . . . . . . . . . . . . . . 36 16.3 Wave soldering . . . . . . . . . . . . . . . . . . . . . . . 36 16.4 Reflow soldering . . . . . . . . . . . . . . . . . . . . . . 37 17 Soldering: PCB footprints . . . . . . . . . . . . . . . 39 18 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 42 19 Revision history . . . . . . . . . . . . . . . . . . . . . . . 42 20 Legal information . . . . . . . . . . . . . . . . . . . . . . 43 20.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 43 20.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 20.3 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 43 20.4 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 44 21 Contact information . . . . . . . . . . . . . . . . . . . . 44 22 Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 |
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